To answer your first point - there is not a simple safe answer apart from - if in doubt, leave well alone.
Question: does the pump have a two or three core cable and is your outside supply protected with a 30Ma RCD?
Hands-on: Acer Predator Triton 700 review
D&AD Awards 2017: see the best design, advertising, illustration, animation and VR of the past year
How to lose weight with an Apple Watch